Again, you are still arguing against your own misapprehension. You can pair different colors with black, yes. Like midnight blue, burgundy, dark green, etc. What you cannot pair with black is browns and tans. For reasons already explained.

I can pair a dark brown watch strap with black shoes. I know this because I have - and I think it looks fine. The fact that you don't think it looks fine is something I am really very okay with.

I can't recall anyone suggesting pairing a tan strap with black dress shoes, but that is not a choice I would make.